Apparatus foe loading gabs



(No Model.) I s Sheets-Sheet 1.

0. H. CAMPBELL & w. WHIGHAM. APPARATUS FOR LOADING CARS.

No. 475,293. Patented May'Z4, 1892.

Arm/mm] (No Model.) A I s sheets-sheet -2.

G. H. CAMPBELL & W. WHIGHAM.

APPARATUS FOR LOADING CARS.

No. 475,293. PatentedMay. '24, 1 92;

ATTORNEY.

(No Model.) 8 Shett-Sheet 3.

0. H. CAMPBELL & w. WHIGHAM.

' APPARATUS FOR LOADING CARS.

No. 475,293. Patented May 24, 1892.

ATTORNEY.

.(No Model.) 8 SheetsSheet 4.

G. H. CAMPBELL & W. WHIGHAM. APPARATUS FOR LOADING CARS.

No. 475,293. Patented May 24', 18,92.

WIT/H8858: I W lNl/E/VTOHS ATTORNEY.

(No Model.) 8Sheets-Shet 5. G.'H. CAMPBELL & W. WHIGHAM.

APPARATUS FOR LOADING CARS.

Patented May 24, 1892.

WUVVE/VTOH ga a?262E262 ATTORNEY.

(No Model.) I F 8 She etsShee t 6. j G. H. CAMPBELL & W. WHIGHAM.

APPARATUS FOR LOADING CARS.

No. 475,293. Patented May 24, 1892;

WITNESSES} A IIVVENTORJ fm/ M I ATTORNEY.

(No Model.) SSheetS 'Sheet 7.

C. H. CAMPBELL 82 W. WHIGHAM.

APPARATUS FOR LOADING CABS.

Patented May 24, 1892.

/ z INVENTOR WITNESSES ATTORNEY.

n1! Noam ruin; cm, mom-1.1mm wnsumm'ou, n. c.

(No Model) 8 Sheets-Sheet s.

e. H. CAMPBELL saw WHIGHAM.

APPARATUS FOR LOADING cARs'. No. 475,293. Patented M33 24, 1892.

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ATTORNEY.

" NITED STATES.

PATENT OFFICE.

CHARLES HENDERSON CAMPBELL, OF NEWV YORK, N. Y., AND WILLIAM WVHIGHAM,OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR LOADING CARS.

SPECIFICATION forming part of Letters Patent No. 475,293, dated May 24,1892.

Application filed February 18, 1891. Serial No. 382,007- (No model.)

To all whom it may concern.-

Be it known that we, CHARLES HENDERSON CAMPBELL, of New York, N. Y., andWILLIAM WVHIGHAM, of Pittsburg, in the county of Allegheny and State ofPennsylvania, citizens of the United States, have invented certain newand useful Improvements in Apparatus for Unloading Cars; and we dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit pertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification, in whichFigure 1 is a plan of the apparatus. Fig. 2 is a perspective of theannular ring which supports the elevating devices. Fig. 3 is aperspective view of a plate upon which said ring is carried. Fig. 4 isan elevation, partly in section, of cylinder-carriage. Fig. 5 is an endelevation of same and of car-conveying truck and car secured thereto.Fig. 6 is an enlarged detail of the clutching device. Fig. 7 is anenlarged end View of wheel for operating the same. Fig. 8 is anelevation of the operating-platform, showing flexible connectionsbetween various cylinders and pressure and exhaust main, also elevationof clutch and operating-levers. Fig. 9 is a side elevation of theapparatus. Fig. 10 is an end section of block 11. said block. Fig. 11 isa view of one end of truck, partly in section, showing the block whichoperates in slides therein and chain connected with said block. Fig. 12is a plan of the central portion of the cylinder-carriage, showingloading-cylinders, elevating and agitating cylinders, and the flexibleconnections of the same with four-way cocks or valves.

Fig. 13 is an enlarged side elevation of opposite side, partly insection, of one end of said cylinder-carriage. Fig. 1a is a plan offourway cocks, partly in section. Fig. 15 is an elevation of theelevating device and shovel. Fig. 16 is a sectional view of elevatingdevice through line 11 1 of Fig. 15, showing sectional views ofcylinders 27 and cylinders 30 30, secured upon one side of saidelevating device. Fig. 17 is an enlarged section throughcrosshead ofagitating-cylinder of said elevating Fig. 10 is a side view of 7 device.shovel.

Our invention relates to an apparatus for unloading ore-cars. Saidapparatus consists of a cylinder-carringe mounted on ways elevated abovethe car to be unloaded, a truck carrying said carriage and ways andmounted upon a track inclosing the ordinary railwaytrack. Mounted andsuitably secured upon said carriage is a number of hydraulic cylinders,as follows: a vertical cylinder, which we have designated theelevating-cylinder, one or more cylinders, which we designate asloading-cylinders, secured on said carriage above the plane of saidelevating-cylinder, the piston rod or rods of which are connected, as

Fig. 18 is a rear end view of the hereinafter described, with saidelevating-cyltrunnions of said cylinder, the piston rod or rods of thecylinder or cylinders secured upon the vertically-movable mast beingconnected to the rear end of a shovel pivotally attached to the lowerend of said mast, and minor details of construction hereinafterdescribed.

'WVe will now more specifically describe our invention, reference beinghad to the accompanying drawings, forming part hereof, in which likeletters and figures indicate like parts wherever they occur.

' 1 is a railway. 2 is a car thereon.

3 is a railway, the rails of which are parallel with and inclose therails of the ordinary track 1.

4 is a car-conveying truck supported on wheels 5 and adapted to be movedon track 3.

6 and 6 are sprocket-gears on shaft 7 and 7 respectively, which arejournaled in suitable bearings in the upright supports for main slides 8on beams 9.

10 and 10 are chains which pass around I each end of said car,respectively, the end of 5 IOO side of said truck. Said block 11 isprovided with a socket in the center thereof longitudinally, the samehaving a thread for the reception of the correspondingly-tbreaded innerend of shaft 12, which is supported in suitable hearings on the side ofthe frame of said truck, the outer end of said shaft being provided withthe hand-wheel 13, by rotating which in the proper direction the block11 is caused to move backward and forward horizontally in the slide 14,formed between the lower beams of said truck, thereby tightening thechain around one end of said car and causing the same to move in thesame direction as said block until the slack of chain 10 at the oppositeend of said car is taken up, thereby securely fasteuin g said truck andcar together preparatory to operating the unloading device, ashereinafter described.

15 is a chain to operate the wheel 16, secured upon the shaft 17, whichextends transversely said device and is suitably journaled in bearings18. Keyed on said shaft at either side of said machine and at almost theextreme ends thereof, respectively, are the beveled gears and 20, whichmesh with the beveled gears 19 and 19' on the upper ends, respectively,of the threaded shafts 20" and 20". The lower ends of said verticalthreaded shafts 20" and 20" respectively operate in acorrespondingly-threaded orifice through one end of the shoe or brakes21 21', the opposite end of said brakes, respectively, being pivotedupon the brackets 22 22, whereby the motion communicated to said shaft17 by operating said wheel 16 by means of the chain thereon istransmitted through the beveled gears to the threaded shafts whichoperate in the free ends of said brakes, whereby the same may be drawntightly against or released from I-beams 9, accordingly as said wheelmay be rotated, thereby rigidly clamping said device upon or releasingit from said I-beams.

A is an ordinary hydraulic pump suitably connected with the boiler B.Vhen the requisite pressure is obtained in any ordinary and usualmanner, the water is carried under pressure through the pipe 23 to theoperating-platform C, which is secured to the trolley orcylinder-earriage D, resting and adapted to travel on slides 8, whichare supported upon the I- beams 9,-and then into the pressure-main 24.

25 25 25 25 are pipes provided with fourway valves or cocks 26 26 26 26,and connect the pressure and exhaust mains with,respectively,thehydrauliccylinder27,theoperation of which verticallyelevates theload, as hereinafter described, and a traversing cylinder28, the operation of which, as hereinafter described, enables the deviceto move laterally in either direction. The loading-cylinder 29 29, theoperation of which is hereinafter described, oscillates thevertically-movable mast, operating in grooves on the side of saidcylinder 27, and advances the shovel which is connected therewith in ahorizontal direction, and the discharge-cylinders 3O 30, the operationof which, as hereinafter described, depresses and elevates the rear endof the shovel, whereby the contents thereof are discharged from eitherend thereof, the function of said cylinders when operated during theloading operation being to agitate the rear end of said shovel in suchmanner as to enable the front or nose of the same to get under lumps andirregular portions of the contents of the.

car. The pressure being conveyed from the pump through pipe 23 into thepressure main 24 is applied to the cylinders by operating the four-wayvalve in one direction, and by reversing the same pressure isalternately applied to and exhausted from either end of said cylinder.As explanatory of this, referring to the position of the lever whichoperates said valves or cocks, as shown in Fig. 1, the pressure in saidcylinders is static when said levers are in said position. Given thatthe pipe on the left of the outer cock communicates or connects with theupper end of cylinder 27 by throwing the outer lever operating the sametoward the left, pressure is applied to the top of said cylinder, andthe lower end of the same exhausts through the pipe at the right of saidlever into the exhaust-main 32 and thence into the tank 33 through pipe34. Said main cylinder 27 is provided with trunnions 27', journaled inthe sides of the annular ring 35, and is also provided with a longpiston-rod 27 operating therein, the lower end of which is rigidlysecured in the orifice 36 in a solid block 37 of steel or iron, whichforms the lower end of the vertically-movable mast 38, the sides ofwhich are formed of I-beams 39 39', the interior sides thereof beingprovided with slides 40 40, bolted or otherwise suitably securedthereon, said slides being adapted to operate in grooves 41 41 on theexterior sides of said cylinder 27, whereby said elevating device andthe shovel 42, which is pivotally connected with lower ends of theplates 43 43, secured to the lower end of said verticallymovable mast38, may be lifted vertically by operating said piston 27 29 and 29 arecylinders rigidly secured upon the annular plate 44, which rests and isadapted to rotate upon slides 45, which move laterally in eitherdirection on ways 46 46, as hereinafter described. Said cylinders arerespectively provided with piston-rods 29' 29', the outer ends of whichare suitably connected by the rod or strap 47. 48 and 48 are armssuitably secured to said rod or strap 47 near the ends thereof, theinner ends of said arms, respectively, being pivoted upon the trunnions49 and 49 on either sideof said main or elevating cylinder 27 at a pointabove and in line where said cylinder 27 is trunnioned in the saidannular ring 35, whereby when said pistons 29 29 are actuated in eitherdirection said vertically-movable mast 38 and the main or elevatingcylinder 27 are caused to oscillate or swing on said trunnions 27'backward and forward, accordingly as said piston-rods are moved. To therear end cross-head 52 is adapted to move.

of said shovel 42 and suitably secured thereon is the bracket 50, to theupper end of which is pivotally connected the links 51 51, the upper endof said links being respectively similarly connected with the cross-head52 on the piston-rods 30 30, which operate in the discharge-cylinder 3030, said cylinders 30 30 being suitably secured to the I-beam 39' oneither side thereof, which forms one side of the vertically-movable mast38.

53 is a slot in the lower part of the I-beam 39 longitudinally the same,in which said The function of said cylinders is, first, to elevate anddepress the rear end of said shovel, whereby the contents of the samemay be discharged from either end; second, to hold the rear of saidshovel in a stationary position at any required angle while said shovelis forced into the contents of the car, and, third, to agitate the rearend of said shovel rapidly while the same is being forced forward intothe ore or other substance, thereby giving said shovel a vibrating orsearching motion and enabling the front or nose of the same to get underor avoid lumps or irregularities in whatever is being unloaded. Theoperation of said cylinder is as follows: Power or press ure beingadmitted alternately to either end of said cylinders, by operating theproper four-way valve or cock, as heretofore described, the piston-rodsoperating therein are actuated vertically in either direction, therebydepressing and elevating alternately the rear end of said shovel, and byactuating said pistons rapidly vibrates the same simultaneously it isforced forward by the. operation of the cylinders 29 29, as heretoforedescribed.

28 is a cylinder, and 28 is a long piston-rod extending through bothends thereof and adapted to operate therein. The ends, respectively, ofsaid piston-rod are provided with cross-heads 28" 28", the top of whichare provided with slides t, adapted to operate on the rod to, which issuitably fastened to the sides of upright supports 63. Said cross-heads28 2S arerespectively provided with sheaves 54 54, over whichrespectively pass wire ropes d and d, respectively, the inner ends ofwhich respectively are fastened to the cross-heads 28" 28',respectively.

c c are sheaves suitably secured to plates 63, which are secured toupright supports 63 63 at either end of said device, over which saidropes (Z and d pass, whereby the platform or carriage 55 (to either endof which at point 55' 55' the ends, respectively, of said ropes,respectively, are attached) is enabled to travel at greater speed and agreater distance than said cross-heads 28 28', and said movable carriage55 is caused to move laterally in either direction on stationary slides56 56, extending transversely said machine, according] y as either endof said piston-rod is operated, carrying, also,in the same directionrespectively, having secured thereto levers 59 I and 59, which areconnected at their outer ends, respectively, with the rods 60 and 60,respectively. Said rods 60 and 60 are respectively connected with thelower end of levers 61 61, respectively, and are adapted to operate thesame. The upper ends of said levers 61 61 are secured, respectively,upon the outer end of the shafts 62 62, which are respectively supportedin suitable bearings formed in the sides of the upright supports 63 63.Said shafts 62 62 are respectively provided with right and left handedthreads, said right-hand threads being formed on said shafts aboutintermediate their length and adapted to operate in suitably-threadedbearings 64 64, bolted upon the inner sides of said upright supports 6363. The inner ends of said shafts or bolts, respectively, are providedwith left-handed threads which operate in a number ofcorrespondingly-threaded orifices in one side the bars 65 and 65,respectively, which extend transversely the width of the trolley D andon either side said annular ring 35, the other or inner sides of saidbars, respectively, having V- shaped grooves therein adapted, whenforced against the correspondingly-shaped rim of said annular ring 35 bythe operation of the lovers 57 57, the shafts 62 62, and intermediatemechanism, to clutch and hold the same stationary during the loadingoperation. Whenit is desirable to turn said shovel around, byreleasing'the clutch on either side of said annular ring 35 accordinglyas it is desirable to turn said shovel, and by the application of powerto cylinder 28, as heretofore described, said annular ring is caused torotate in a direction toward the point in which the same is held inclutch, turning therewith the cylinder 27, trunnioned therein, and theelevating device and shovel connected therewith, also the annular plate45, whereon the cylinders 29 29 are mounted.

E is an ordinary reversing-engine, which is suitably supported on theplatform cylindercarriage D. By operating the levers ff, connected withthe shaft 9 from the platform 0, said engine is actuated as in the caseof an ordinary locomotive. Power is transmitted to the spur-gear h,secured on the power-shaft 2', and thence to the large spur-gears j,keyed on the shaft k, which extends transversely the width of platform Dand is suitably journaled in the sides of said platform. At either end,respectively, of said shaft 70 are keyed the sprocket-wheels Z Z.

F F are endless .chains, which pass along sprocket-wheels 6 and 6,respectively, upon shafts 7 and 7, respectively, at the bottom of saidconveying-truck 4. Said chains are fed, respectively, under idlers 'n non either side of said sprocket-wheels Z and Z, respectively.

Bolted on I-beams 9 9 are brackets 0, which carry bearings for theshafts p p on either side of said device, secured on which aresprocket-wheels q q. r is a shaft at one end of said truck, at the topthereof, having secured to either end thereof the idlers s s, the top ofsaid idlers being in line with the bottom of idlers n and n for thepurpose of giving direction to said chains.

t t are idlers secured in brackets somewhat below the plane of idlers nn and secured upon either side said truck near the top thereof.

We deem it unnecessary to further describe the operation of our device,it being only necessary to repeat the action hereinbefore described tounload said car or cars. It may be, however, necessary to change therelative position of the unloading device and the car during saidoperation,which may be done as follows:

By clamping the cylinder-carriage, as heretofore described, and theengine being in operation, it is obvious that the truck 4: will be drawnalong its track, and, providing the car is secured thereto, asheretofore described, it will move in unison therewith and may becarried to and from the place of unloading.

It is obvious that the connections between the pressure and exhaustmains and the various cylinders must be flexible, so as to enable saiddevice to move laterally and in a circle, as hereinbefore described. Itis also obvious that the Ways whercon said cylinder-carriage is mountedmay be permanently located at any point independent of saidcar-conveying truck and said truck dispensed with and the cars to beunloaded conveyed to and from said cylinder-carriage or unloader in anysuitable manner and the contents removed therefrom, as heretoforedescribed, and dumped on endless belt or belts or the ordinarycar-conveyers and from thence discharged into the proper bins therefor.

Having described our invention, what we claim, and desire to secure byLetters Patent, 1s

1. In an apparatus for unloading cars, substantially as described, thecombination of a vertically-movable lever, means to oscillate the same,a shovel pivotally connected with the lower end of said lever, and meansto depress and elevate the rear end of said shovel, whereby said shovelmay be given a vibrating or searching motion when being forced intoearth or other substances, as set forth.

2. In an apparatus for unloading cars, substantially as described, thecombination of a vertically-movable lever, means to rotate the same, ashovel pivotally connected with said lever, and means to depress andelevate the rear end of said shovel, whereby said shovel is given avibrating motion and turned, substantially as and for the purpose hereinset forth.

3. In an apparatus for unloading cars, substantially as described, thecombination of a vertical cylinder trunnioned in the sides of an annularring and having a piston -rod adapted to operate therein, means toactuate said piston, a Vertically-movable mast the lower end of which isrigidly secured to the lower end of said piston and adapted to operatein grooves in the sides of said cylinder, and a shovel pivotallyconnected to the lower end of said mast, substantially as described.

4. In a hydraulic unloader, substantially as described, the combinationof a carriage mounted on ways, a cylinder trunnioned in the sides of anannular ring suitably secured thereon, said cylinder having a piston-rodadapted to operate therein and means to actuate the same, avertically-movable mast the lower end of which is rigidly secured to thelower end of said piston and having on its interior sides slides adapted.to operate in grooves on the exterior of said trunnioned cylinder, anda shovel pivotally connected with the lower end of said mast, wherebythe said mast and the shovel connected thereto are elevated and lowered,substantially as and for the purpose herein described.

5. In a hydraulic unloading device, substantially as described, thecombination of a carriage mounted on ways and having a cylindertrunnioned in the sides of an annular ring suitably secured thereon,means to rotate said ring, said cylinder having a pistonrod adapted tooperate therein, means to actuate the same, an elevating device rigidlyconnected at its lower end with thelower end of said piston-rod andhaving on its interior sides slides adapted to operate in grooves on theexterior of said trunnioned cylinder, and a shovel pivotally connectedwith the lower end of said elevating device, whereby said elevatingdevice and the shovel secured thereto are elevated, lowered, and turnedaround, substantially as and for the purpose herein set forth.

6. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways and having a cylinder trunnionedin the sides of an annular ring mounted thereon, said cylinder havingapiston-rod adapted to operate therein and means to actuate the same, anelevating device the lower end of which is rigidly connected with thelower end of said piston-rod and having on its interior sides slidesadapted to operate in grooves on the sides of said trunnioned cylinder,a shovel pivotally connected to the lower end of said elevating device,and a cylinder or cylinders suitably secured on an annular plate adaptedto rotate, said cylinders having piston-rods adapted to operate thereinand means to actuate the same, the outer ends of said pistons beingsuitably connected by a strap, to which are suitablysecured arms, theinner ends of which are pivotally connected on either side saidtrunnioned cylinder near the top thereof, whereby the shovel connectedto said elevating device may be advanced or forced into a mass of earth,ore, or other substance and lifted,-substantially as herein set forth.

7. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways an d having a cylinder trunnionedin the sides of an annular ring mounted thereon and means to rotate saidring,said cylinderhaving a piston-rod adapted to operate therein andmeans to actuate the same, an elevating device the lower end of which isrigidly connected with the lower end of said piston-rod and having onits interior sides slides adapted to operate in grooves on the sides ofsaid trunnioned cylinder, ashovel pivotally connected to the lower endof said elevating device, and a cylinder or cylinders suitably securedon an annular plate, said cyllnders having piston-rods adapted tooperate therein and means to actuate the same, the outer endsbeingsuitablyconnected byastrap, to which aresuitably secured arms, theinner ends of which are pivotally connected on either side saidtrunnioned cylinder near the top thereof, whereby the shovel connectedto said elevating device may be advanced or forced into a mass of earth,ore, or other substance, elevated, and turned in a circle, substantiallyas and for the purpose herein set forth.

8. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways and having a cylinder trunnionedin the sides of an annular ring mounted thereon, said cylinder having apiston-rod adapted to operate therein and means to actuate the same, anelevating device the lower end of which is rigidly connected with thelower end of said piston-rod and having on its interior sides slidesadapted to operate in grooves on the sides of said trunnioned cylinder,a shovel pivotally connected to the lower end of said elevating device,and a cylinder or cylinders suitably secured on an annular plate adaptedto rotate, said cylinders having piston-rods adapted to operate thereinand means to actuate the same, the outer ends of said piston-rods beingsuitably connected by a strap, to which are suitably secured arms, theinner ends of which are pivotally connected on either side saidtrunnioned cylinder near the top thereof, and a cylinder suitablysecured upon one side said elevating device and having a piston-rodadapted to operate therein and means to actuate the same, the lower endof said piston-rod being suitably connected to the rear end of saidshovel,whereby said shovel may be advanced or forced into a mass ofearth or other substance with a vibrating or searching motion andelevated, substantially as and for the purpose herein set forth.

9. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways and having a cylinder trunnionedin the sides of an annular ring mounted thereon and means to rotate saidring, said cylinder having a piston-rod adapted to operate therein andmeans to actuate the same, an elevating device the lower end of which isrigidly connected with the lower end of said piston-rod and having onits interior sides slides adapted to operate in grooves on the sides ofsaid trunnioned cylinder, a shovel pivotally connected to the lower endof said elevating device, and a cylinder or cylinders suitably securedon an annular plate adapted to rotate, said cylinder having pistonrodsadapted to operate therein and means to actuate the same, the outer endsbeing suitably connected by a strap, to which are suitably secured arms,the inner ends of which are pivotally connected on either side saidtrunnioned cylinder near the top thereof, and a cylinder suitablysecured upon one side said elevating device and having a piston-rodadapted to operate therein and means to actuate the same, the lower endof said pistonrod being suitably connected to rear end of said shovel,whereby said shovel may be ad vanced or forced into a mass of ore orother substance with a vibrating or searching motion, elevated, andturned in a circle, substantially as and for the purpose set-forth.

10. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways and having a cylinder trunnionedin the sides of an annular ring mountedthereon and means to rotate thesame, said cylinder having a piston-rod adapted to operate therein andmeans to actuate the same, an elevating device the lower end of which isrigidly connected to the lower end of said piston-rod and having on itsinterior sides slides adapted to operate in grooves on the sides of saidtrunnioned cylinder, a shovel pivotally connected to the lower end ofsaid elevating device, and cylinder or cylinders suitably secured on anannular plate mounted on slides and adapted to rotate thereon, saidcylinders having piston-rods adapted to operate therein and means toactuate the same, the outer ends of said pistons being suitablyconnected by a strap, to which are suitably secured arms, the inner endsof which are pivotally connected on either side said trunnioned cylindernear the top thereof, a cylinder having a piston rod extending throughboth heads of said cylinder and means to actuate the same, and aplatform or carriage mounted on slides and adapted to move thereon, andmeans to connect either end, respectively, of said platform with eitherend, respectively, of said piston-rod, whereby said shovel may beadvanced, lifted, and turned and said device moved laterally,substantially as herein set forth.

11. In a hydraulic unloader, substantially as described, the combinationof a cylindercarriage mounted on ways and having a cylinder trunnionedin the sides of an annular ring mounted thereon and means to rotate thesame, said cylinder having a piston-rod ICC adapted to operate thereinand means to actuate the same, an elevating device the lower end ofwhich is rigidly connected to the lower end of said piston-rod andhaving on its interiorsides slides adapted to operate in grooves on thesides of said trunnioned cylinder, a shovel pivotally connected to thelower end of said elevating device, and cylinder or cylinders suitablysecured on an annular plate mounted on slides and adapted to rotatethereon, said cylinders having piston-rods adapted to operate thereinand means to actuate the same, the outer ends of said pistons beingsuitably connected by a strap, to which are suitablysecured arms, theinner ends of which are pivotally connected on either side saidtrunnioned cylinder near the top thereof, a cylinder suitably securedupon one side said elevating device and having a piston rod adapted tooperate therein and means to actuate the same, the lower end of saidpistonrod being suitably connected to the rear end moved laterally ineither direction, substantially as and for the purpose herein set forth.In testimony that We claim the foregoing We hereunto affix oursignatures this 14th day of February, A. D. 1891.

CHARLES HENDERSON CAMPBELL. WILLIAM WHIGHAM.

In presence of O. 0. LEE, JOSEPH H. CAMPBELL.

